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liraira [26]
3 years ago
8

Why is adult stem cell research less controversial than embryonic stem cell research?

Biology
2 answers:
jok3333 [9.3K]3 years ago
7 0

。☆✼★ ━━━━━━━━━━━━━━  ☾

The correct option would be B. consent can be obtained from adult stem cell donors.

The controversy behind the other option is that it is a form of life, but no consent is taken from the actual life. (i know it's phrased weirdly, my bad)

Have A Nice Day ❤  

Stay Brainly! ヅ  

- Ally ✧  

。☆✼★ ━━━━━━━━━━━━━━  ☾

schepotkina [342]3 years ago
3 0

Answer:

Consent can be obtained from adult stem cell donors.

Explanation:

Considered very special cells, stem cells appear in humans even during the embryonic phase, that is, even before birth. As soon as the baby comes into the world, some organs still hold a small portion of stem cells within them, which become responsible for the constant renewal of that specific organ. The extraction of these stem cells has been the subject of controversy for years. This is because many people believe that it is an invasion of the baby's body that does not have the capacity to consent and protect its own organism.

However, some of these stem cells accompany the human being until adulthood (in smaller quantities than the baby) the extraction of these cells in adults is less controversial, because unlike the baby the adult can consent to the manipulation of his organism.

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A fish maintains its depth in fresh water by adjusting the air content of porous bone or air sacs to make its average density th
Volgvan

Answer:

0.153

Explanation:

We know the up-thrust on the fish, U = weight of water displaced = weight of fish + weight of air in air sacs.

So ρVg = ρ'V'g + ρ'V"g where ρ = density of water = 1 g/cm³, V = volume of water displaced, g = acceleration due to gravity, ρ'= density of fish = 1.18 g/cm³, V' = initial volume of fish, ρ"= density of air = 0.0012 g/cm³ and V" = volume of expanded air sac.

ρVg = ρ'V'g + ρ"V"g

ρV = ρ'V'g + ρ"V"

Its new body volume = volume of water displaced, V = V' + V"

ρ(V' + V") = ρ'V' + ρ"V"

ρV' + ρV" = ρ'V' + ρ"V"

ρV' - ρ"V'  = ρ'V" - ρV"

(ρ - ρ")V'  = (ρ' - ρ)V"

V'/V" = (ρ - ρ")/(ρ' - ρ)

= (1 g/cm³ - 0.0012 g/cm³)/(1.18 g/cm³ - 1 g/cm³)

= (0.9988 g/cm³ ÷ 0.18 g/cm³)

V'/V" = 5.55

Since V = V' + V"

V' = V - V"

(V - V")/V" = 5.55

V/V" - V"/V" = 5.55

V/V" - 1 = 5.55

V/V" = 5.55 + 1

V/V" = 6.55

V"/V = 1/6.55

V"/V = 0.153

So, the fish must inflate its air sacs to 0.153 of its expanded body volume

5 0
3 years ago
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